/*
 * Copyright (c) 2001-2004 Caucho Technology, Inc.  All rights reserved.
 *
 * The Apache Software License, Version 1.1
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Caucho Technology (http://www.caucho.com/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "Hessian", "Resin", and "Caucho" must not be used to
 *    endorse or promote products derived from this software without prior
 *    written permission. For written permission, please contact
 *    info@caucho.com.
 *
 * 5. Products derived from this software may not be called "Resin"
 *    nor may "Resin" appear in their names without prior written
 *    permission of Caucho Technology.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author Scott Ferguson
 */
package net.hasor.libs.com.caucho.hessian.io;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.util.HashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
/**
 * Deserializing a JDK 1.2 Map.
 */
@SuppressWarnings({ "unused", "unchecked" })
public class MapDeserializer extends AbstractMapDeserializer {
    private Class<?>       _type;
    private Constructor<?> _ctor;
    public MapDeserializer(Class<?> type) {
        if (type == null)
            type = HashMap.class;
        _type = type;
        Constructor<?>[] ctors = type.getConstructors();
        for (int i = 0; i < ctors.length; i++) {
            if (ctors[i].getParameterTypes().length == 0)
                _ctor = ctors[i];
        }
        if (_ctor == null) {
            try {
                _ctor = HashMap.class.getConstructor(new Class[0]);
            } catch (Exception e) {
                throw new IllegalStateException(e);
            }
        }
    }
    public Class<?> getType() {
        if (_type != null)
            return _type;
        else
            return HashMap.class;
    }
    public Object readMap(AbstractHessianInput in) throws IOException {
        Map<Object, Object> map;
        if (_type == null)
            map = new HashMap<Object, Object>();
        else if (_type.equals(Map.class))
            map = new HashMap<Object, Object>();
        else if (_type.equals(SortedMap.class))
            map = new TreeMap<Object, Object>();
        else {
            try {
                map = (Map<Object, Object>) _ctor.newInstance();
            } catch (Exception e) {
                throw new IOExceptionWrapper(e);
            }
        }
        in.addRef(map);
        while (!in.isEnd()) {
            map.put(in.readObject(), in.readObject());
        }
        in.readEnd();
        return map;
    }
    @Override
    public Object readObject(AbstractHessianInput in, Object[] fields) throws IOException {
        String[] fieldNames = (String[]) fields;
        Map<Object, Object> map = createMap();
        int ref = in.addRef(map);
        for (int i = 0; i < fieldNames.length; i++) {
            String name = fieldNames[i];
            map.put(name, in.readObject());
        }
        return map;
    }
    private Map<Object, Object> createMap() throws IOException {
        if (_type == null)
            return new HashMap<Object, Object>();
        else if (_type.equals(Map.class))
            return new HashMap<Object, Object>();
        else if (_type.equals(SortedMap.class))
            return new TreeMap<Object, Object>();
        else {
            try {
                return (Map<Object, Object>) _ctor.newInstance();
            } catch (Exception e) {
                throw new IOExceptionWrapper(e);
            }
        }
    }
}
